Plastic base



FIG. 1 is a perspective view of the plastic base;

FIG. 2 is a top plan view of the plastic base of FIG. 1;

FIG. 3 is a front side view of the plastic base of FIG. 1, the rear side view being the mirror image thereof;

FIG. 4 is a right side view of the plastic base of FIG. 1, the left side view being the mirror image thereof;

FIG. 5 is a bottom plan view of the plastic base of FIG. 1;

FIG. 6 is a perspective view of an alternative embodiment of the plastic base;

FIG. 7 is a top plan view of the plastic base of FIG. 6;

FIG. 8 is a front side view of the plastic base of FIG. 6, the rear side view being the mirror image thereof;

FIG. 9 is a right side view of the plastic base of FIG. 6, the left side view being the mirror image thereof; and,

FIG. 10 is a bottom plan view of the plastic base of FIG. 6. 

The ornamental design for a plastic base, as shown and described. 